Mouse antiserum directed against the recombinant NucA protein was reactive on Western immunoblots and whole-cell ELISA with all H. influenzae strains tested including Eagan and was bactericidal for two heterologous strains tested. The antiserum also resulted in a log reduction in bacteremia, in an infant-rat protection study with H. influenzae type b as the challenge strain (Zagursky et al., 2000).
Zagursky et al., 2000: Zagursky RJ, Ooi P, Jones KF, Fiske MJ, Smith RP, Green BA. Identification of a Haemophilus influenzae 5'-nucleotidase protein: cloning of the nucA gene and immunogenicity and characterization of the NucA protein. Infection and immunity. 2000 May; 68(5); 2525-34. [PubMed: 10768940].